For recognition, the front or trailing edge of projection of binary image on horizontal axis basically shows linear shape, so least square theory is applied in tilt correction.
识别过程中，数码管二值化后的图像在水平轴上的投影，其上升沿或下降沿基本呈现直线的形状，尝试把最小二乘法应用于倾斜校正。
For tilted characters only in horizontal direction, even without tilt correction, this method can achieve better segmentation.
这种分割方法对只在水平方向倾斜的字符，即使不经过倾斜矫正，也能达到较好的字符分割效果。
For tilted characters only in horizontal direction, even without tilt correction, this method can achieve better segmentation.
这种分割方法对只在水平方向倾斜的字符，即使不经过倾斜矫正，也能达到较好的字符分割效果。
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